I have a WebAPI 2.1 service (ASP.Net MVC 4) that receive and image and related data. I need to send this image from WPF application, but I get 404 not found error.
Server side
[HttpPost]
[Route("api/StoreImage")]
public string StoreImage(string id, string tr, string image)
{
// Store image on server...
return "OK";
}
Client side
public bool SendData(decimal id, int time, byte[] image)
{
string url = "http://localhost:12345/api/StoreImage";
var wc = new WebClient();
wc.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
var parameters = new NameValueCollection()
{
{ "id", id.ToString() },
{ "tr", time.ToString() },
{ "image", Convert.ToBase64String(image) }
};
var res=wc.UploadValues(url, "POST", parameters);
return true;
}
The url exists, I thing I need to encode to json format, but I don't know how.
Thanks for your time!
The method parameters in your case are received in QueryString
form.
I would suggest you turn the parameters list into one single object like this:
public class PhotoUploadRequest
{
public string id;
public string tr;
public string image;
}
Then in you API convert the string to buffer from Base64String
like this:
var buffer = Convert.FromBase64String(request.image);
Then cast it to HttpPostedFileBase
HttpPostedFileBase objFile = (HttpPostedFileBase)new MemoryPostedFile(buffer);
Now you have the image file. Do whatever you want.
Full Code here:
[HttpPost]
[Route("api/StoreImage")]
public string StoreImage(PhotoUploadRequest request)
{
var buffer = Convert.FromBase64String(request.image);
HttpPostedFileBase objFile = (HttpPostedFileBase)new MemoryPostedFile(buffer);
//Do whatever you want with filename and its binaray data.
try
{
if (objFile != null && objFile.ContentLength > 0)
{
string path = "Set your desired path and file name";
objFile.SaveAs(path);
//Don't Forget to save path to DB
}
}
catch (Exception ex)
{
//HANDLE EXCEPTION
}
return "OK";
}
Edit: I forgot to add the Code for MemoryPostedFile
class
public class MemoryPostedFile : HttpPostedFileBase
{
private readonly byte[] fileBytes;
public MemoryPostedFile(byte[] fileBytes, string fileName = null)
{
this.fileBytes = fileBytes;
this.FileName = fileName;
this.InputStream = new MemoryStream(fileBytes);
}
public override void SaveAs(string filename)
{
File.WriteAllBytes(filename, fileBytes);
}
public override string ContentType => base.ContentType;
public override int ContentLength => fileBytes.Length;
public override string FileName { get; }
public override Stream InputStream { get; }
}
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